VFD Selection

I want to get a VFD for my Hitachi M12V router so I can vary the
speed for metal, aluminum, and wood milling. The M12V is a single-
phase series commutator motor, 115VAC, 60HZ, 15 Amps router. I would
like to use my 120VAC outlet for the VFD. Can someone tell me what
kind of VFD I should get? I have noticed some VFD have 3 to 1 phase
conversion and all sort of specifications. I certainly do not want
to buy the wrong one. Also, it should interface to my pmdx.com break
out board.

Thanks,